CN106120823B - A kind of Temporary Cofferdam combination against seepage structure and rapid constructing method - Google Patents
A kind of Temporary Cofferdam combination against seepage structure and rapid constructing method Download PDFInfo
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- CN106120823B CN106120823B CN201610532934.9A CN201610532934A CN106120823B CN 106120823 B CN106120823 B CN 106120823B CN 201610532934 A CN201610532934 A CN 201610532934A CN 106120823 B CN106120823 B CN 106120823B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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Abstract
The invention discloses a kind of Temporary Cofferdam combination against seepage structure and rapid constructing method.Structure includes the seepage prevention system and weir inside and outside side slope protection system by filling weir body that sand long tube bag fills, being made of bentonite plastic concrete wall, clay compaction layer and buttress type Reinforced Concrete Retaining Walls.The bottom of the waterproof basement rock of plastic concrete wall lower end insertion, upper end and Reinforced Concrete Retaining Walls is affixed, and both sides are equipped with three axes agitating pile；Clay compaction layer is filled in the side near water of plastic concrete wall and Reinforced Concrete Retaining Walls junction；Hydraulic fill sand is filled between weir body and three axes agitating pile.The present invention can realize the mutual supplement with each other's advantages of each leakage preventing structure, and the hydrological environment according to residing for the body slope surface of weir, the fast safeguard structure of corresponding function admirable, Simple And Practical, speed of application is selected in optimization, realize Temporary Cofferdam rapid construction, it ensure that the water-stagnating effect in cofferdam and stable, ensured the antiseepage flood fighting performance in cofferdam；There is technically reliable, save duration and ecological, environmental protective.
Description
Technical field
The present invention relates to technical field of civil engineering, more particularly to a kind of Temporary Cofferdam combination against seepage structure and rapid construction
Method, is mainly used in across the coffering in the subway and Tunnel Engineering of rivers.
Background technology
River, lake offshore Temporary Cofferdam engineering in, weir body main stuffing is using local soil, sand, stone etc. mostly
Material, low engineering cost and easy for construction, but this kind of filler mostly there are infiltration coefficient it is larger the problem of, cofferdam need to construct antiseepage
Architecture is to ensure dry work in weir.At present in earth rock cofferdam engineering, antiseepage is mostly using compacted cohesive soil core wall, coagulation
Although the structures such as native cut-pff wall, steel sheet pile core wall and high pressure spray board wall, said structure disclosure satisfy that requirement of engineering, but wherein clay
Filling for core wall is big by engineering specifications and weather influence, and the duration is difficult to control；And other leakage preventing structures there are cost it is high, apply
The problem of work difficulty is greatly and the duration is longer.On the other hand, excavation pit is often needed to carry out main body construction in Temporary Cofferdam weir, cofferdam is not
The evitable certain deformation of generation, and after engineering in addition to an a small number of parts as later stage Underwater Engineering Structure thing, greatly
Part cofferdam needs to remove after being finished, and considers the compatibility of deformation ability and cofferdam demolition of seepage prevention of cofferdam structural system so still needing
Complexity and influence to environment.In addition, rivers offshore Temporary Cofferdam construction process need to consider the shadow of river level change
Ring, weir body should be applied into completions before wet season flood rise, and current traditional seepage prevention system and weir body side slope protection knot
Structure can not meet this requirement due to long construction period.
The content of the invention
The technical problem to be solved in the present invention is overcome the deficiencies of the prior art and provide a kind of antiseepage and compatibility of deformation ability
Get well, low engineering cost, speed of application are fast and the Temporary Cofferdam combination against seepage structure and rapid constructing method of ecological, environmental protective.
In order to solve the above technical problems, technical solution proposed by the present invention is：
A kind of combination against seepage structure of Temporary Cofferdam, fills the agent structure of weir body to fill sand long tube bag, the weir body
Different protection systems is respectively equipped with side and the land side side slope of meeting water, the middle part of weir body is equipped with seepage prevention system, the impervious body
System includes bentonite plastic concrete wall, Reinforced Concrete Retaining Walls and clay compaction layer, the bentonite plastic concrete wall
Lower end is embedded in waterproof basement rock, and upper end is fixedly connected with the bottom of the Reinforced Concrete Retaining Walls, the clay compaction layer filling
In the side near water of bentonite plastic concrete wall and Reinforced Concrete Retaining Walls junction, the two of the bentonite plastic concrete wall
Side is equipped with three axes agitating pile, and described fill between sand long tube bag and three axes agitating pile fills hydraulic fill sand.
Improved as to the further of above-mentioned technical proposal：
Preferably, the Reinforced Concrete Retaining Walls are buttress type Reinforced Concrete Retaining Walls, the buttress type armored concrete
Barricade bottom is equipped with two parallel tenons and forms a groove, and the bentonite plastic concrete wall upper end passes through embedded bar riveted
It is in in the groove and with the wall facade of buttress type Reinforced Concrete Retaining Walls in same perpendicular.
Preferably, the sand long tube bag that fills is the split yarn flat filament polypropylene woven geotechnique for having the function of anti-ultraviolet aging
Stringing bag, it includes front end compartment and rear bag body, and row's compartment cuff is set on the compartment；The bag body rear end, which is set, to be added
Rib tape, the fixed draw ring of sewing in reinforced bands, rear bag body set multiple rows of bag of body cuff along its length, and first row bag body is tucked inside the sleeve
The distance of mouth and compartmentLIt need to be adjusted according to SEA LEVEL VARIATION, the reinforced bands arrange the distance between bag body cuff with last
About 2m.
Preferably, the thickness of the bentonite plastic concrete wall is 600 ~ 1000mm, infiltration coefficient no more than 3.2 ×
10-7Cm/s, it is embedded in the depth of waterproof basement rock and is not less than 2.0m；The compartment width is 2.0 ~ 3.0m, the diameter of bag body cuff
For 0.3m, the spacing often arranged between bag body cuff is 6m.
Preferably, the protection system of the side that meets water is protection system waterborne, and the protection system waterborne is compiled for polypropylene
Weaving+small-sized sand hill bank protection；The protection system of the land side is sewing in the woven cloth for filling sand long tube bag surface.
Preferably, horizontal sewing reinforced bands and tying up are buckled on polypropylene woven cloth in the protection system waterborne of the side that meets water,
The sand hill buckles fixation by tying up, and the top of polypropylene woven cloth is fixed in the clay compaction layer by fixed steel bars, pressure
Casting concrete bank protection on real argillic horizon.
Preferably, the woven cloth bottom in the protection system of the land side is fixed by backfilling sand pebble layer, it is sewed
It is in horizontal interval, vertical interlaced arrangement in filling the suture on sand long tube bag.
The present invention also provides a kind of rapid constructing method of above-mentioned Temporary Cofferdam combination against seepage structure, include the following steps：
1）Fill the making of sand long tube bag：
Fill sand long tube bag using walking mould bag processing technology make, by the single-layer polypropylene braided geotextile after processing by
Block on the ground, afterwards by industrial sewing machine on movable stand, is walked along woven cloth piece and is processed；Between woven cloth, adopt
Carried out spelling width sewing, twice polyamide fibre line, stitch spacing≤7mm with " fourth seam " method；Sewing machine is moved during sewing, make speed of advancement with
Sewing machine stitch work feed speed is consistent；The seam of each sack should not be excessive, and the spacing of contiguous concatenation seam should be greater than 2m；
2）Weir body construction：
2.1）Carry out filling sand long tube bag coarse positioning successively and be accurately positioned using Working Ships or so whirlpool anchor cable, hydraulic system,
Fill sand long tube bag and flow to laying downstream, long tube bag position location deviates 2 ~ 3m than design toward upstream；
2.2）Fill after sand long tube bag stacks and complete 2~3 layers, pumped downstream in filling between sand long tube bag for meet water side and land side
Hydraulic fill sand is sent, sand long tube bag is filled and replaces with hydraulic fill sand and fill to design altitude；
2.3）Placement in layers clay compaction layer at the top of sand long tube bag is filled in the side that meets water；
3）Seepage prevention system construction in the middle part of the body of weir：
3.1）Using compartment diplopore full set complex mixing type construction technology three axes agitating pile；
3.2）After three axes agitating pile pile 15d, the wall excavation of leading for carrying out bentonite plastic concrete wall pours：Its wall groove
Hole was divided to for two phases constructed, and a phase slot sets locking notch pipe before bentonite plastic concrete pours at slot both ends, pours close to wall
Embedded bar is arranged during top；
3.3）After bentonite plastic concrete wall detection of construction quality qualification, carry out buttress type Reinforced Concrete Retaining Walls and apply
Work：Tenon size according to set by buttress type Reinforced Concrete Retaining Walls bottom excavates groove, binding in plastic concrete wall both sides
Reinforcing bar simultaneously welds facade reinforcing bar and embedded bar, and wall facade and counterfort are poured after first pouring wall heel slab；
4）The protection system construction of weir body side slope：
4.1）Meet water side protection system construction：
Woven cloth is manually laid with, small-sized sand hill is tied up and is buckled in the reinforced bands of woven cloth, woven cloth upper limb is layed in compacting
Argillic horizon is simultaneously squeezed into reinforcing bar and is fixed, casting concrete bank protection on clay compaction layer；
4.2）Land side protection system is constructed：
Woven cloth is sewed in filling sand long tube bag surface using industrial sewing needlework, woven cloth bottom backfill sand pebble layer is consolidated
Foot.
Preferably, the distance between the compartment for filling sand long tube bag and first row bag body cuffLAdjust according to the following formula：
L=the depth of water+water surface to sampan bottom height+sampan height+1.0m；
It is filled and laying method is specially：Compartment is sunk under water after turnover panel filling using its dead weight, fills sand length at this time
The first row bag body cuff nearest from compartment is placed exactly in sampan top surface, filling compartment to first row bag on the rear bag body of pipe bag
After bag body between body cuff, Working Ships are retreated along cofferdam axis, second row bag body cuff is placed exactly in sampan top surface, so
Each row's bag body cuff is filled successively to finish until filling the long geo-tube filling of sand.
Preferably, step 3 is carried out）Weir body in the middle part of seepage prevention system construction when, counterfort wall concrete structure construction is complete
Cheng Hou, it is not necessary to backfill sand behind in Reinforced Concrete Retaining Walls；Carry out step 4.1）Weir body side slope meet water side protection system
Before construction, the reinforced bands for being 500mm along polypropylene woven cloth top sewing level interval, are along reinforced bands direction sewing spacing
0.5m's ties up button, and the thick C15 concrete of 1m wide, 10cm is poured at the top of bank protection, and sets the φ 22 for being inserted into and filling in sand long tube bag
Fixed steel bars, height H=1m.
Compared with prior art, the advantage of the invention is that：
（1）The Temporary Cofferdam combination against seepage structure of the present invention, by bentonite plastic concrete cut-off wall, buttress type concrete
Barricade and compacted cohesive soil layer combine antiseep, and composition one closing, complete antiseepage are combined with the waterproof basement rock of weir body
System, with reference to the corresponding protection form of weir body slope surface different parts, can realize the mutual supplement with each other's advantages of all kinds of leakage preventing structures.Wherein swelling
Native plastic concrete can obtain the deformation modulus being adapted with surrounding soil by adjusting match ratio, have compatibility of deformation ability
It is good, be not likely to produce the good working performance such as crack, and low cost, remove the advantages of convenient, effect on environment is small；Buttress type
Reinforced Concrete Retaining Walls have preferable impermeability, and need not backfill sand behind in barricade, reduce difficulty of construction, add
Fast construction speed, not only solves the technical barrier of rainy season construction clay cut-off wall, while reduce project cost.
（2）Filling sand long tube bag positioning construction technology can ensure that cofferdam is high-quality, efficiently fills, and can utilize river adaptation to local conditions
Road dredged sand is filled, and has the advantages that to economize on resources, ecological, environmental protective；Weir body side slope land side and the side above water point that meets water
Not Cai Yong woven cloth, the protection form and concrete facing of woven cloth+small-sized sand hill, ship underwater operation, energy can be utilized
Accelerate construction progress, after preventing rivers flood season floating material shock weir body from filling sand long tube bag, cause a bag body breakage, pipe bag sand flow to lose,
The severe safety quality accident of weir body unstability, while ensure the stability of barricade wall heel position Clay Microstructure.
On the whole, the present invention combine good plastic concrete wall compatibility of deformation ability, low cost, working performance it is good,
The advantages of convenient and buttress type concrete guard wall impermeability is good, speed of application is very fast is removed, and can be according to weir body slope surface institute
Corresponding Simple And Practical safeguard structure is selected in the hydrological environment at place, optimization, ensure that the water-stagnating effect in cofferdam and stable, guarantor
The antiseepage flood fighting performance in cofferdam is hindered, cofferdam structure and its construction method have quick construction, technically reliable, economically feasible, tear open
The advantages that except facilitating.
Brief description of the drawings
Fig. 1 is the schematic diagram of Temporary Cofferdam combination against seepage structure of the present invention.
Fig. 2 is the main structure diagram of buttress type Reinforced Concrete Retaining Walls in the present invention.
Fig. 3 is the side structure schematic view of buttress type Reinforced Concrete Retaining Walls in the present invention.
Fig. 4 is that buttress type Reinforced Concrete Retaining Walls and the connection structure of bentonite plastic concrete wall are illustrated in the present invention
Figure.
Fig. 5 is that weir body meets water the structure diagram of side protection system waterborne in the present invention.
Fig. 6 is the structure diagram of body land side protection system in weir in the present invention.
Fig. 7 is the suture arrangement schematic diagram of body land side protection system in weir in the present invention.
Fig. 8 is that the plane of arrangement figure of compartment and cuff on sand long tube bag is filled in the present invention.
Marginal data：
1st, bentonite plastic concrete wall；2nd, buttress type Reinforced Concrete Retaining Walls；3rd, clay compaction layer；4th, three axis stir
Stake；5th, hydraulic fill sand；6th, sand long tube bag is filled；7th, meet water side protection system；8th, land side protection system；9th, weir bottom pervious bed；10th, no
Permeable basement rock；11st, toe of wall plate；12nd, tenon；13rd, wall facade；14th, wall heel slab；15th, counterfort；16th, embedded bar；17th, polypropylene
Woven cloth；18th, sand hill；19th, fixed steel bars；20th, concrete revetment；21st, suture；22nd, sandy gravel；23rd, compartment；24th, bag body；
25th, compartment cuff；26th, bag body cuff；27th, reinforced bands；28th, draw ring.
Embodiment
For the ease of understanding the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face, meticulously describe, but protection scope of the present invention is not limited to embodiment in detail below.
Embodiment 1
As shown in Fig. 1~Fig. 8, a kind of Temporary Cofferdam combination against seepage constructive embodiment of the invention, fills the main body of weir body
Structure is fills sand long tube bag 6, and weir inside and outside side slope is equipped with different protection systems, and respectively meet water side protection system 7 and backwater
Side protection system 8, the middle part of weir body are equipped with seepage prevention system, and seepage prevention system includes bentonite plastic concrete wall 1, buttress type reinforcing bar
Concrete guard wall 2 and clay compaction layer 3,1 lower end of bentonite plastic concrete wall are embedded in waterproof basement rock 10, upper end and buttress type
The bottom of Reinforced Concrete Retaining Walls 2 is fixedly connected, and both sides are equipped with three axes agitating pile 4, and clay compaction layer 3 is filled in bentonite plasticity
The side near water of 2 junction of concrete walls 1 and buttress type Reinforced Concrete Retaining Walls, fills between sand long tube bag 6 and three axes agitating pile 4 and fills out
Fill hydraulic fill sand 5.Bentonite plastic concrete wall 1 can match to obtain and surrounding soil phase by adjusting plastic concrete in the present invention
The deformation modulus of adaptation, and with compatibility of deformation ability is good, ultimate deformation is big, low cost, working performance are good and it is convenient to remove
The advantages of；Buttress type Reinforced Concrete Retaining Walls 2 have preferable impermeability, and speed of application is very fast；Clay compaction layer 3 can have
Effect improves bentonite plastic concrete wall 1 and the seepage capability of 2 junction of buttress type Reinforced Concrete Retaining Walls；By bentonite plasticity
Concrete walls 1, buttress type Reinforced Concrete Retaining Walls 2 and clay compaction layer 3 combine antiseep, and with waterproof 10 groups of basement rock
Close and form closing, a complete seepage prevention system, with reference to the corresponding protection form of weir body slope surface different parts, can realize all kinds of anti-
Ooze the mutual supplement with each other's advantages of structure；Weir body slope surface selects corresponding Simple And Practical safeguard structure, energy according to residing hydrological environment, optimization
Ensure the water-stagnating effect in cofferdam and stable, ensure the antiseepage flood fighting performance in cofferdam, there is quick construction, technically reliable, tear open
The advantages that except facilitating.
In the present embodiment, 14 bottoms of wall heel slab of buttress type Reinforced Concrete Retaining Walls 2 is equipped with two parallel tenons 12, two
A groove is formed between tenon 12, wall facade 13 is connected with wall heel slab 14 by counterfort 15, and toe of wall plate 11 plays the role of antidumping.
In the present embodiment, the materials for wall of bentonite plastic concrete wall 1 is bentonite plastic concrete, by cement, swollen
Profit soil, water, sand, stone and additive mix are formed after pouring curing, and each raw material ratio is according to infiltration coefficient and optimal deformation
Modulus requirement, is preferably obtained by related physical mechanical test, cement in the present embodiment, bentonite, water, sand, stone and additional
Agent ratio is preferably 1：0.37：1.6：5.77：4.18：0.02；The thickness of bentonite plastic concrete wall 1 is 600-1000mm,
Preferably 800mm, infiltration coefficient are not more than 3.2 × 10-7Cm/s, the depth that waterproof basement rock 10 is goed deep into its lower end are not less than
2.0m, is preferably 2.2m.Mixed through weir bottom pervious bed 9 to waterproof 10 top surface of basement rock, bentonite plasticity 4 lower end of three axes agitating pile
Solidifying 1 upper end of cob wall by the groove riveted between embedded bar 16 and the wall bottom tenon 12 of buttress type Reinforced Concrete Retaining Walls 2 simultaneously
It is in wall facade 13 in same perpendicular.Three axes agitating pile 4 can be reinforced and have to the cell wall of bentonite plastic concrete wall 1
There is water-stop curtain.
In the present embodiment, it is the split yarn flat filament polypropylene woven soil for having the function of anti-ultraviolet aging to fill sand long tube bag 6
Work stringing bag, it includes front end compartment 23 and rear bag body 24, and the width of compartment 23 is 2.0-3.0m, sets row's compartment to tuck inside the sleeve thereon
Mouth 25；24 rear end of bag body sets reinforced bands 27, sews fixed draw ring 28 in reinforced bands 27, bag body 24 is set along its length
The bag body cuff 26 of multiple rows of a diameter of 0.3m, the distance between compartment 23 and first row bag body cuff 26LNeed to be according to SEA LEVEL VARIATION
It is adjusted, reinforced bands 27 arrange the distance between bag body cuff about 2m with last, often arrange the spacing between bag body cuff 26
For 6m.
In the present embodiment, the side protection system 7 that meets water is protection system waterborne, its structure is using polypropylene woven cloth+small-sized
Sand hill protective slope structure, horizontal sewing reinforced bands and tying up are buckled on polypropylene woven cloth 17, and small-sized sand hill 18 buckles fixation by tying up, and poly- third
The top of alkene woven cloth 17 is fixed in clay compaction layer 3 by fixed steel bars 19, casting concrete bank protection on clay compaction layer 3
20。
In the present embodiment, using the guard technology for directly covering woven cloth, woven cloth bottom passes through land side protection system 8
Backfill sandy gravel 22 is fixed, and it is in horizontal interval, vertical interlaced arrangement that it, which is sewed in filling the suture 21 on sand long tube bag 6,.
Embodiment 2
The rapid constructing method of the Temporary Cofferdam combination against seepage structure of the present invention, includes the following steps：
1）Fill the making of sand long tube bag：
Fill sand long tube bag 6 and use walking mould bag processing technology, by the individual layer woven cloth block-by-block after processing on the ground,
Afterwards by industrial sewing machine on movable stand, walk and process along woven cloth piece.Between woven cloth, carried out using " fourth seam " method
Spell width sewing, twice polyamide fibre line, stitch spacing≤7mm.Sewing machine is moved during sewing, makes speed of advancement and sewing machine stitch work feed
Speed is consistent.The seam of each sack should not be excessive, and the spacing of contiguous concatenation seam should be greater than 2m.
2）Weir body construction：
2.1）Receive the signal of satellite and terrestrial reference platform according to the GPS on Working Ships, acquisition accurately arranges ship position
Coordinate, positions Working Ships, the travelling winch located lateral of four port and starboards for being arranged in ship, fills sand using six positioning of anchor modes
Long tube bag 6 is laid with flows to laying downstream using volume row's rolling laid process, and long tube bag position location deviates 2 ~ 3m than design toward upstream；
2.2）After the completion of arranging ship positionning, Sand blowing ship and sand carrier are drawn close side by side and lean on water side in Working Ships, it is first when arranging
Sand long tube bag volume 6 will be filled on motor-driven reel, be then laid on deck and turnover panel, according to the several of GPS on Working Ships and turnover panel
What position relationship, reaches in middle sea and draws ship type in HyNav positioning softwares and import long tube bag physical location DXF figures, so as to obtain
The distance and orientation of long tube pocket position target location, the thick of long tube bag is carried out using Working Ships or so whirlpool anchor cable, hydraulic system successively
Position and be accurately positioned；
2.3）Compartment 23 is filled when being laid with long tube bag first on turnover panel, and compartment is fixed by two steel wires or nylon rope
Two angles at 23 decentralization ends, the other end is fixed on hull, put down afterwards turnover panel and while ship is moved compartment 23 from recast
Slowly sunk under water with lower, lowering velocity and the decentralization pipe bag speed of steel wire are consistent, and Working Ships translational speed is less than
Reel transfers the speed of pipe bag；
2.4）Fill after sand long tube bag 6 is laid with and stacks and complete 2~3 layers, in filling between sand long tube bag for meet water side and land side
Hydraulic fill sand 5 is pumped downstream, is filled sand long tube bag 6 and is replaced with hydraulic fill sand 5 and fills to design altitude；
2.5）Placement in layers clay compaction layer 3 at the top of sand long tube bag is filled in the side that meets water, clay making along cofferdam axis direction into
OK, using dump truck discharging, bull-dozer puts down material, manually flattens side slope and corner earth material, is mainly spread using retrogressing method
Material, every layer of loose laying depth are 30cm, compacted thickness 25cm, and every layer of clay material is needed after the completion of filling after soil sample test qualification
It can carry out filling for last layer.
3）Seepage prevention system construction in the middle part of the body of weir：
3.1）Three axes agitating pile 4 needs to excavate the extra-fill part of clay compaction layer 3 before constructing, in place by pile foundation after figure setting-out,
Using compartment diplopore full set complex mixing type construction technology three axes agitating pile 4；
3.2）After 4 pile 15d of three axes agitating pile, the wall excavation of leading for carrying out bentonite plastic concrete wall 1 pours, and leads wall and adopts
With the C30 reinforced concrete walls of 20cm thickness, depth 1.6m, two lead wall clear spacing is set to according to plastic concrete wall thickness
85cm, leads wall segmentation slope and excavates, the back-filling in layers compacting of shaping posterior dorsal clay, leading wall needs 10cm above ground level, to prevent ground
Water enters in groove.The slot of bentonite plastic concrete wall 1 was divided to for two phases constructed, and a phase slot is before plastic concrete pours in groove
Hole both ends set locking notch pipe, need to mark framing line before grooving on wall is led and indicate corresponding numbering, and chute forming machine is pressed shallow after first depth, first marks
The sequence construction of special-shaped width after quasi- width, when grooving, often struggle against advanced depth control in 0.3m or so, and the verticality of adjustment grab bucket in time, is protected
Grooving vertical precision is demonstrate,proved more than 4/1000；
3.3）Bentonite plastic concrete irrigates the double duct underwater casting method that uses, and mouth is opened away from 30 ~ 50cm of slot bottom under conduit
Beginning need to place water proof ball in the catheter when pouring to ensure pouring quality, and in two internal buckle steel nails of conduit bottom spot welding to puncture
Water proof ball.Plastic concrete face height difference not should be greater than 50cm in casting process, and the rate of climb is controlled in 0.2 ~ 0.3m/min, conduit
Slowly lifted with pouring for plastic concrete, keep conduit mouth buried depth between 2.0 ~ 6.0m.When pouring close to wall
During body top surface, the embedded bar of connection buttress type concrete guard wall is placed, plastic concrete is not easy to flow out at this time, and buried depth can
1.5m is kept to, conduit can be twitched up and down if necessary, but twitches scope and must not exceed 30cm, is poured pre- close to being arranged during wall top
Bury reinforcing bar 16；
3.4）The construction quality of bentonite plastic concrete wall 1 is detected using high-density electric, can after qualified
Carry out buttress type Reinforced Concrete Retaining Walls 2 to construct, the thickness 40cm of wall heel slab 14 of buttress type Reinforced Concrete Retaining Walls 2, wall facade 13
And the thickness 30cm of counterfort 15, wall bottom tongue 12 width 0.3m, deep 0.5m, excavated according to 12 size of tenon in plastic concrete wall both sides
Groove 0.55m is deep, and chisel removes plastic concrete wall freeboard section, and feather plucking simultaneously clears up plastic concrete wall exposed portion, first pricks wall heel slab
14 reinforced mesh, then 13 reinforcing bar of wall facade and embedded bar 16 are welded, the shaping of 14 concrete one-time-concreting of wall heel slab, wall facade
13rd, counterfort 15 is poured according to wall high sublevel.
4）The protection system construction of weir body side slope：
4.1）Meet water side protection system construction waterborne：
Meet water before the protection system construction of side, the reinforced bands that level interval is 500mm sewed along the top of polypropylene woven cloth 17,
The reinforced bands for being 0.5m along reinforced bands direction sewing spacing tie up button, are manually laid with polypropylene woven cloth 17 afterwards, and will be small-sized
Sand hill 18, which is tied up, to be buckled on reinforcing rib, the thick C15 concrete of 1m wide, 10cm is poured at the top of bank protection, and set insertion and fill sand long tube
φ 22 in bag（H=1m）Fixed steel bars, finally pour the C15 concrete revetments of 10cm thickness on clay compaction layer；
4.2）Land side protection system is constructed：
Woven cloth is sewn in using industrial sewing needlework and fills 6 surface of sand long tube bag, its 21 horizontal interval of suture, vertically interlock
Arrangement, for vertical spacing with 6 floor height of sand long tube bag is filled, the horizontal long 1.5m of suture 21, is spaced 1.0m, woven cloth bottom backfill sandy gravel
22 solid feet.
In the present embodiment, fill between the compartment 23 of sand long tube bag 6 and the first row bag body cuff 26 of rear bag body 24 away from
FromLIt need to be adjusted according to SEA LEVEL VARIATION,L=the depth of water+water surface to sampan bottom height+sampan height+1.0m；Fill sand long tube
During bag 6, compartment 23 is sunk under water using its dead weight after turnover panel filling, fill at this time on the rear bag body 24 of sand long tube bag 6 from every
The nearest first row bag body cuff 26 in cabin 23 is placed exactly in sampan top surface, and filling compartment 23 is between first row bag body cuff 26
Working Ships are retreated along cofferdam axis after bag body, second row bag body cuff 26 is placed exactly in sampan top surface, and so filling is each successively
Row's bag body cuff 26 finishes until filling the filling of sand long tube bag 6.
Claims (7)
1. a kind of rapid constructing method of Temporary Cofferdam combination against seepage structure, it is characterised in that by the use of filling sand long tube bag as filling
The agent structure of weir body, is respectively equipped with different protection systems in meet water side and the land side side slope of the weir body, in the body of weir
Portion is equipped with seepage prevention system, and the seepage prevention system includes bentonite plastic concrete wall, buttress type Reinforced Concrete Retaining Walls and compacting
Argillic horizon, the lower end of the bentonite plastic concrete wall are embedded in waterproof basement rock, upper end and the buttress type armored concrete
The bottom of barricade is fixedly connected, and the clay compaction layer is filled in bentonite plastic concrete wall and buttress type armored concrete gear
The side near water of wall junction, the both sides of the bentonite plastic concrete wall are equipped with three axes agitating pile, it is described fill sand long tube bag with
Hydraulic fill sand is filled between three axes agitating pile；Concrete construction method includes the following steps：
1) making of sand long tube bag is filled：
Sand long tube bag is filled to be made of walking mould bag processing technology；
2) weir body construction：
2.1) carry out filling sand long tube bag coarse positioning successively and be accurately positioned using Working Ships or so whirlpool anchor cable, hydraulic system, fill sand
Long tube bag flows to laying downstream, and long tube bag position location deviates 2~3m than design toward upstream；
2.2) fill after sand long tube bag stacks and complete 2~3 layers, fill between sand long tube bag that pumping is blown downstream in meet water side and land side
Back-up sand, fills sand long tube bag and replaces with hydraulic fill sand and fill to design altitude；
2.3) placement in layers clay compaction layer at the top of sand long tube bag is filled in the side that meets water；
3) the seepage prevention system construction in the middle part of the body of weir：
3.1) compartment diplopore full set complex mixing type construction technology three axes agitating pile is used；
3.2) after three axes agitating pile pile 15d, the wall excavation of leading for carrying out bentonite plastic concrete wall pours：Its wall slot point
Two phases constructed, and a phase slot sets locking notch pipe before bentonite plastic concrete pours at slot both ends, pours close to wall top
When arrange embedded bar；
3.3) after bentonite plastic concrete wall detection of construction quality qualification, buttress type Reinforced Concrete Retaining Walls construction is carried out：Root
Groove is excavated in plastic concrete wall both sides according to the tenon size set by buttress type Reinforced Concrete Retaining Walls bottom, assembling reinforcement is simultaneously
Facade reinforcing bar and embedded bar are welded, wall facade and counterfort are poured after first pouring wall heel slab；
4) the protection system construction of weir body side slope：
4.1) meet water side protection system construction waterborne：
Polypropylene woven cloth is manually laid with, small-sized sand hill is tied up and is buckled in the reinforced bands of polypropylene woven cloth, polypropylene woven cloth
Upper limb is layed in clay compaction layer and squeezes into reinforcing bar and fixes, casting concrete bank protection on clay compaction layer；
4.2) land side protection system is constructed：
Woven cloth is sewed in filling sand long tube bag surface using industrial sewing needlework, woven cloth bottom backfill sand pebble layer consolidates foot.
2. construction method according to claim 1, it is characterised in that：The buttress type Reinforced Concrete Retaining Walls bottom is equipped with
Two parallel tenons form a groove, and the bentonite plastic concrete wall upper end is riveting in the groove by embedded bar
And it is in the wall facade of buttress type Reinforced Concrete Retaining Walls in same perpendicular.
3. construction method according to claim 2, it is characterised in that：The sand long tube bag that fills is with anti-ultraviolet aging
Split yarn flat filament polypropylene woven geotechnique's stringing bag of function, it includes front end compartment and rear bag body, is set on the compartment
One row's compartment cuff；The bag body rear end sets reinforced bands, the fixed draw ring of sewing in reinforced bands, and rear bag body is along length side
To multiple rows of bag of body cuff of setting, the distance L of first row bag body cuff and compartment need to be adjusted according to SEA LEVEL VARIATION, the reinforcement
It is 2m that band arranges the distance between bag body cuff with last.
4. construction method according to claim 3, it is characterised in that：The compartment for filling sand long tube bag and first row bag body
The distance between cuff L is adjusted according to the following formula：
The L=depth of waters+water surface to sampan bottom height+sampan height+1.0m；
It is filled and laying method is specially：Compartment is sunk under water after turnover panel filling using its dead weight, fills sand long tube bag at this time
Rear bag body on the first row bag body cuff nearest from compartment be placed exactly in sampan top surface, filling compartment to first row bag body is tucked inside the sleeve
After bag body between mouthful, Working Ships are retreated along cofferdam axis, second row bag body cuff is placed exactly in sampan top surface, so successively
Each row's bag body cuff is filled to finish until filling the long geo-tube filling of sand.
5. construction method according to claim 4, it is characterised in that：The walking mould bag processing technology of the step 1)
For：By the single-layer polypropylene braided geotextile block-by-block after processing on the ground, afterwards by industrial sewing machine on movable stand,
Walk and process along woven cloth piece；Between woven cloth, carry out spelling width sewing, twice polyamide fibre line, stitch spacing using " fourth seam " method
≤7mm；Sewing machine is moved during sewing, makes speed of advancement consistent with sewing machine stitch work feed speed；The seam of each sack is unsuitable
Excessively, and contiguous concatenation seam spacing should be greater than 2m；
When carrying out seepage prevention system construction in the middle part of the weir body of step 3), after the completion of counterfort wall concrete structure construction, it is not necessary to
Sand is backfilled behind in Reinforced Concrete Retaining Walls；
The weir body side slope of progress step 4.1) meets water before the protection system construction of side, along polypropylene woven cloth top sewing level interval
For the reinforced bands of 500mm, button is tied up for 0.5m along reinforced bands direction sewing spacing, it is thick that 1m wide, 10cm are poured at the top of bank protection
C15 concrete, and set insertion and fill 22 fixed steel bars of φ in sand long tube bag, height H=1m.
6. construction method according to claim 5, it is characterised in that：The thickness of the bentonite plastic concrete wall is
600~1000mm, infiltration coefficient are not more than 3.2 × 10-7Cm/s, it is embedded in the depth of waterproof basement rock and is not less than 2.0m；It is described
Compartment width is 2.0~3.0m, a diameter of 0.3m of bag body cuff, and the spacing often arranged between bag body cuff is 6m.
7. construction method according to claim 6, it is characterised in that：Woven cloth seam in the protection system of the land side
It is in horizontal interval, vertical interlaced arrangement to be formed on the suture filled on sand long tube bag.
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| CN108677980B (en) * | 2018-07-12 | 2023-10-31 | 中国电建集团贵阳勘测设计研究院有限公司 | Upstream cofferdam heightening method and structure taking traffic function into consideration |
| CN110055934A (en) * | 2018-11-21 | 2019-07-26 | 中铁十一局集团第六工程有限公司 | A kind of high water level earth and rockfill dam Construction of plastic concrete cut-off wall method |
| CN111155429A (en) * | 2019-01-05 | 2020-05-15 | 中铁上海工程局集团有限公司 | Construction method for bridge sand blowing island building in still water deep water area |
| CN110424202B (en) * | 2019-08-20 | 2021-03-30 | 中建协和建设有限公司 | Wave-proof structure of coastal roadbed and construction method thereof |
| CN111733842A (en) * | 2020-06-19 | 2020-10-02 | 三峡大学 | Cofferdam construction method and cofferdam structure |
| CN112962516B (en) * | 2021-02-23 | 2022-06-03 | 河海大学 | Design and construction method of danger-removing reinforcement measure for inhibiting dike foundation piping |
| CN115354624B (en) * | 2022-08-18 | 2024-05-10 | 浙江华东工程建设管理有限公司 | Cofferdam structure suitable for cross-pile type spur dike in strong tidal bore area and construction method thereof |
| CN115354680A (en) * | 2022-09-09 | 2022-11-18 | 中国水利水电第六工程局有限公司 | Large river channel inner framework clay core wall type cofferdam construction method |
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| KR20060100315A (en) * | 2006-08-16 | 2006-09-20 | (주)인텔리지오 | Upstream part retaining wall type fill dam |
| CN203066089U (en) * | 2013-01-15 | 2013-07-17 | 广州市市政工程设计研究院 | Cofferdam combined by mold bag sand and steel sheet piles and used for hard strata |
| CN204626427U (en) * | 2015-03-18 | 2015-09-09 | 李伟 | Assembling cofferdam |
| CN105604075B (en) * | 2016-03-04 | 2017-09-15 | 中铁隧道集团二处有限公司 | It is easy to the interim dock entrance cofferdam construction method and cofferdam structure recovered |
| CN105672197B (en) * | 2016-03-23 | 2017-11-10 | 上海勘测设计研究院有限公司 | The method and structure of heightening and consolidation embankment |
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